164049805 has 8 divisors (see below), whose sum is σ = 197021592. Its totient is φ = 131131968.

The previous prime is 164049803. The next prime is 164049817. The reversal of 164049805 is 508940461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 56160036 + 107889769 = 7494^2 + 10387^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164049805 - 2¹ = 164049803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164049803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6462 + ... + 19231.

It is an arithmetic number, because the mean of its divisors is an integer number (24627699).

Almost surely, 2^164049805 is an apocalyptic number.

It is an amenable number.

164049805 is a deficient number, since it is larger than the sum of its proper divisors (32971787).

164049805 is a wasteful number, since it uses less digits than its factorization.

164049805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26975.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 164049805 is about 12808.1928858056. The cubic root of 164049805 is about 547.4257719959.

The spelling of 164049805 in words is "one hundred sixty-four million, forty-nine thousand, eight hundred five".